| Longford (Barony) |
Jacob Bouverie - Thu 29th Jun 1747
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- |
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| Lonsdale (Viscountcy) |
James Lowther - Mon 24th May 1784
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24 May 1802 |
- |
| Loughguyre (Barony) |
Charles Fane - Fri 22nd Apr 1718
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- |
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| Loughneagh (Barony) |
John Clotworthy - Sun 21st Nov 1660
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| Lowther (Barony) |
John Lowther - Mon 28th May 1696
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7 March 1751 |
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| Lowther (Barony) |
James Lowther - Mon 24th May 1784
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24 May 1802 |
- |
| Lowther (Viscountcy) |
James Lowther - Mon 24th May 1784
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24 May 1802 |
- |
| Lowther (Barony) |
James Lowther - Thu 26th Oct 1797
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| Ludlow (Viscountcy) |
Henry Arthur Herbert - Mon 27th May 1748
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16 January 1801 |
- |
| Macduff (Viscountcy) |
William Duff - Thu 26th Apr 1759
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29 January 1912 |
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| Maitland (Viscountcy) |
John Maitland - Thu 14th Mar 1624
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| Makgill of Cousland (Lordship) |
James Makgill - Wed 19th Apr 1651
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| Malden (Viscountcy) |
Arthur Capell - Wed 20th Apr 1661
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- |
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| of Malmesbury (Marquessate) |
Thomas Wharton - Fri 15th Feb 1715
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20 May 1731 |
- |
| Malpas (Viscountcy) |
Hugh Cholmondeley - Mon 27th Dec 1706
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- |
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| Malton (Barony) |
Charles Watson-Wentworth - Thu 17th Dec 1750
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- |
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| of March (Earldom) |
Charles Lennox - Fri 9th Aug 1675
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| Marnhull (Barony) |
Henry Howard - Sat 13th Mar 1604
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- |
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| Maule (Viscountcy) |
William Maule - Thu 2nd May 1743
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| Maynard (Barony) |
Charles Maynard - Tue 28th Oct 1766
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